This guy did not say this was a soft mod. You made a poor assumption. Period. I think this guy did a great job and I give him the proper cred he deserves. Let me add for those complaining that the description was "misleading".
The person who did this hack did not claim that he hacked the PS3 with a SixAxis. All that was stated was that he didn't want to use a seperate USB device. When asked, it he stated that it did require soldering. He also clearly showed a button on his controller which should have let your to think it was a hardware mod.
So chill out. Have a beer (or root beer if you are not 21+) and either have fun with this mod or wait for another dumb monkey mod.
If you want a simple "any dumb monkey can do it, plug and play mod" just go buy a usb key. The fact is, there are still many of us out here who modify things, just for the enjoyment of hacking into some hardware and playing around.